I don't do such things (I don't think you should question the jewelry part though).
In Europe having anime accessories at work places are commonly seen as "weeb shit", of course unless the company actually works with this stuff in a way.
Additionally, lolicon related accessories could get you into legal trouble since they commonly fail to see the difference between real children and unreal ones.
In Japan having anime accessories (loli or not) is considered a nerdy thing, though unprofessional in different types of industries.
You'll need to take that in mind too, it's totally fine to have those if you work in a game development company for instance, but in companies with mostly salarymen it's a big no-no.
And if allowed, don't have too much with you, because work space is rather limited in room.